h22 turbo need help

[poid]

im like 13.4
we did lean it out but my car responded better when given more fuel. 13.4 was optimal

13.4 isnt rich though

i've seen AFR's in the 10's on a stock ECU at high load/high rpm.

[filoaccord]

here is the setup

Precision sc61 turbo rated at 680hp (usa specs) similar to gt35
- 61mm front wheel and .86rear housing
Custom s/s turbo manifold and hpc coated
Rc eng. 450cc
Tial 38mm wastegate
Custom intercooler kit
Full 3'' exhaust with screamer pipe
Microtech ltx8 ecu

Well black smoke is fuel, you were saying grey smoke. Generally white smoke is coolant, blue is oil, black is fuel.

I doubt it is anything major. I've seen a H series lose its rings and you definitely know when that happens. Oil return is a possibility, or running a ball bearing turbo without restrictor is another possibility. A bit more info on the setup would help, along the lines of what Saxman asked. Was it a kit, what turbo, ECU etc.

CUL8R: you have a richer tune than stock since getting a standalone ECU?? You do realise that the stock ECU runs quite rich under load and that the standalone should be running leaner than stock.

[filoaccord]

well my catch can is connected to the beather at the back of the engine, a hose running it to the catch can and other hose running on the air fliter connected tot he turbo is that correct

hey filoaccord,
i agree with saxman, my car had the same problem and it was to do with the oil return line, hoses that were goin to the catch can were ****ed around with, check urs out.

[filoaccord]

this is a used turbo

I have never seen a well tuned turbo car blow smoke at load. I would seriously consider anyone telling you it's ok.

How many stock turbo cars do you see smoking under load? None. They still have to run the rich a/f ratios.

There's a bigger issue occuring here.

What kind of tuning has been done? New or used turbo? Kit or diy set up?

Generally when I see smoking in a new turbo set up, the first thing I look at is the placement of the oil return line.

[saxman]

why are you running an sc61 and only 450cc injectors?

How much boost are you running?

Are you losing any coolant?

Any shaft play in the turbo? Picture of your return line?

Pull one of the intercooler pipes before the intercooler and check for oil film in the charge pipes.

[[SDCTVE]]

sounds like you got the catch can set up right.... im not too sure about that smoke..... although mechanics have told me a bit of blow by wen i floor it is normal.... it doesnt sound like its anything to worry much about....

[Sexc86]

possilby check your oil return line and make sure that it isnot drilled too low on the sump

[honda_b_blastn]

Charlie's old set up correct?

[siksivic]

if charlie = chubs you are correct ....

[filoaccord]

im only running boost under 8psi and im
not losing coolant at all. will post a pic soon
i will check the intercooler for oil and if there is wats the prob??

why are you running an sc61 and only 450cc injectors?

How much boost are you running?

Are you losing any coolant?

Any shaft play in the turbo? Picture of your return line?

Pull one of the intercooler pipes before the intercooler and check for oil film in the charge pipes.

[saxman]

if you've got oil in the charge pipes, the issue is with oil getting past the seals at the turbo... either as a result of blown seals from the turbo being used, or an incorrectly installed oil return line... or a combo of both.


also, why are you running an sc61 on an 8 psi set up? There are MUCH more applicable turbos for that boost range that would give you a way better powerband and have the turbo running much more efficiently.

[MR-VTEC]

He bought a 2nd hand kit off a guy with a fully built motor.....